Apparatus for molding or casting.



G. ATTERBURY.

APPARATUS FOR MoLmNe 0R CASTING.

APPLICATION FILED OCT. 81 1909.

Patented Feb. 15, 1916.

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APPARATUS FOR MOLDING 0R CASTING.

APPLICATION FILED OCT. S. I9 09.

Patented Feb. 15, 1916.

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Inventor:

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GBOSVENOR ATTERBURY, OF NEW YORK, N. Y.

APPARMACIFU'S FOR MOLDING 0R CASTIG.

Specification of Letters Patent.

Patented Feb. 15, 1916.

l Application ledOotober 8, 1909.` Serial No. 521,664. i

T 0 all whom t may concern.'

Be it known that I, GRosvENoR ATTER- Buer, a citizen of the United States, and a resident of the borough of Manhatt-an, city, county, vand State of New York, have invented certain new and useful Improvements in Apparatus for Molding or Casting, of which the following is a clear and complete disclosure. f

My invention relates to that cl-ass of molding apparatus in which a body or block is cast with interior holes or openings, or eX- terior grooves or both, which holes or openings are formed byl means of suitable cores which are withdrawn while the` material of which the block is castis plastic, and their place taken by sand or other mobile noncementitiousjmaterial which maintains the plastic material `in position after the withdrawal of the cores and until it solidifies.

This invention is an improvement on my apparatus set forth in my prior Patent No. 828,833, andv my pending -application Serial No. 433,539.

Op. Lsst of this invention is to decrease the quantity of sand or mobile material required to form the core, by reducing it to a thin coating around a hollow core or cores.

Another object of my invention is to facilitate the removal of the sand by forming a conical void therein, and to provide a cleaning device forming a part of the mold and adapted to remove any remaining sand or mobile material from the interior of the block.

Still another object of my invention is to facilitate artificial heating and drying of the block.

Further features, advantages and benefits of my invention will be apparent from the following specification and the accompanying drawings forming a part thereof, in which- Figure 1 is a vertical cross-section of my improved mold showing the block complete, and one of the hollow cores and attached cleaning devices in elevation. Fig. 2 isa vertical cross-section showing the block of Fig. 1 as it is being removed from the hollow cores. Fig. 3 is a plan view of the mold and block as shown in Fig. 1. Fig. 4 is a vertical section of the mold and shows the block partly formed.

Referring in detail to the drawings, 1 designates the casing of the mold which may be ofv any usual and ordinary form. This casing Arests on the base 2, on which the block 3 is formed. Inside the casing, and resting on the base 2, are rigid cores 4preferably tapered ror reduced in size at the upper end to facilitate lwithdrawal from the block. These cores are hollow, and heat may be supplied to their interior by means of pipe 5. For use in forming the block, removable hollow cores or partitions 6 are employed. One of these hollow cores is shown in Figa partly removed from the mold boX. The tapered cores l bear at their upper end cleaning members 7, which are in the form of brushes or combs, or both, and

so adapted in size and location that they will, when the block is removed from the tapered cores, brush and clean the interior openings of the block.

My improvedA mold is used in the following manner: Thecasing 1 is located on the base plate or bottom 2, and the tapered cores 4 are placed in position inside the casing and resting on the base-plate, or may be attached thereto. The removable cores 6 are placed in position one surrounding each of the tapered cores. Material in plastic state to form the block is then placed in the mold on the outside of the removable core, and

sand or some mobile non-cementitious and non-solidifying material 8 is placed inside the removable core and surrounding the tapered core. The granular or non-solidifying material forms a surrounding coat for the tapered core, and when the removable core is withdrawn, maintains the shape and form of the block or casting. The removable cores 6 may be withdrawn gradually, and at the same rate that the non-cementitious and cementitious material are supplied to the mold, or the mold may be filled with one or both' materials before the cores are withdrawn, but I prefer the former method. After the mold has been filled with noncementitious and cementitious material, the block may be dried by the application of heat applied to the interior of the tapered cores through the pipe 5. The material 8 not only serves as a surrounding coat and addition to the tapered cores 4, and facilitates their withdrawal from the block, and serves to transmit and diffuse the heat applied to the interior of the cores 4, so as to make the drying of the block gradual and uniform, but may serve as a valuable absorbent and storage medium of surplus wa.-

ter. After the block has set, the casing l is removed and the block is lifted from around the tapered cores by means of a pair of tongs or other suitable device 9. As the block is Withdrawn the sand tends to fallby reason of the void formed bythe cores, and the brushes or cleaners 7 pass through the openings in the block and remove any remaining sand or extraneous material that may tend to cling thereto. The block illustrated has two openings, but the number may be varied as desired. The plastic and solidifying material used in my improved mold may be made of any of the common cementitious or otherwise solidifying materials and may be placed inthe mold in either a liquid, semiliquid or plastic condition. In place vof sand other materials may be used to form a surrounding coat for the tapered core, or sand may be mixed with Water to make it flow more rapidly. The point to beobserved in selecting materials for the core and block is that for the former the material must be mobile and of substantially the same specific gravity as the cementitious material.

While I have described one form of my improved mold, I am aware that modifications thereof may be made by those skilled in the art Without departing from the spirit or scope of my invention, and I desire to secure protection for all such modifications as come Within the scope of my claims.

What I claim is:

l. In a mold for casting cementitious blocks, a base, a removable casing on said base, a removable partition Within said casing spaced therefrom, a tapered core Within said partition and spaced therefrom, and 1 means on said coreto Contact With the blocks when they are removed.

2. In a mold for casting cementitious blocks, a base, a removable casing on said base, a removable partition Within said casing spaced therefrom, a tapered' core Within tween said partition-` and said core, and whereby on removal'of the partition the granular substance 4contacts with the cemf entitious block.l

4. In a mold for castmg cementitious blocks, a base, a removable casing on said base, a removable partition Within said cas-` ing,` spaced therefrom, a tapered core Within said partition and spaced therefrom, and 3a plurality of brushes on said core to contact Withthe blocks When they are removed.

Signed this 6th day of October, 1909. GROSVENOR ATTIERBURY. Witnesses:

JOSEPH P. MARSHALL, ALBERT E. WiLsoN.

.55 granular substance may be introduced bel 

